<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2022\1\6 0006
 * Time: 10:22
 */
$array1=array(
    array(array('1')),
    array(array('2')),
    array(array('3')),
);
$array2=array(
    array(array('4')),
    array(array('5')),
    array(array('6')),
);
$array3=array_merge($array2,$array1);
//$array2[]=$array1;
//谁在前面谁就在前面

echo "<pre>";
var_dump($array3);
echo "</pre>";
die();